British Standards Document
BS 7629-1
Electric cables. Specification for 300/500 V fire resistant, screened, fixed installation cables having low emission of smoke and corrosive gases when affected by fire. Multicore cables

https://doi.org/10.3403/30295205U

BS 7629-1 is maintained by GEL/20/17. The current release of this standard is:

BS 7629-1:2015+A1:2019 Electric cables. Specification for 300/500 V fire resistant, screened, fixed installation cables having low emission of smoke and corrosive gases when affected by fire. Multicore cables

https://doi.org/10.3403/30295205 (published 31/08/2015)

This standard is available from the following sources:

Other historical versions of this standard document also exist:

BS 7629-1:2015 [current until 20/06/2019]
BS 7629-1:2008 [current until 31/08/2016]
BS 7629-1:1997 [current until 30/11/2008]